Compositions based on 2,3,3,4,4,4-hexafluorobut-1-ene

Abstract

A composition including 2,3,3,4,4,4-hexafluorobut-1-ene as a mixture with one or more hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compounds having a boiling point of less than or equal to 0° C. Also, the use of such a composition in heat transfer applications. Also, a heat transfer installation including a vapor compression circuit containing such a composition as heat-transfer fluid or containing a heat-transfer composition including such a composition, and also one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof.

The invention claimed is: 
     
       1. A quasi-azeotropic composition consisting of:
 a mixture of 5-30% by weight of 2,3,3,4,4,4-hexafluorobut-1-ene and 70-95% by weight of trans-1,3,3,3-tetrafluoropropene, 
 
       wherein the difference between the liquid saturation pressure and the vapor saturation pressure at a temperature of −5° C. is less than or equal to 10% of the liquid saturation pressure. 
     
     
       2. The composition as claimed in  claim 1 , which is non-flammable. 
     
     
       3. A heat-transfer composition, comprising the composition as claimed in  claim 1  as heat-transfer fluid, and also one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof. 
     
     
       4. A heat transfer installation comprising a vapor compression circuit containing a composition as claimed in  claim 1  as heat-transfer fluid optionally with one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof. 
     
     
       5. The installation as claimed in  claim 4 , chosen from mobile or stationary heat-pump heating, air-conditioning, refrigeration, freezing and Rankine cycle installations. 
     
     
       6. A process for heating or cooling a fluid or a body by means of a vapor compression circuit containing a heat-transfer fluid, said process successively comprising the evaporation of the heat-transfer fluid, the compression of the heat-transfer fluid, the condensation of the heat fluid and the depressurization of the heat-transfer fluid, in which the heat-transfer fluid is a composition as claimed in  claim 1 . 
     
     
       7. The process as claimed in  claim 6 , which is a process for cooling a fluid or a body, in which the temperature of the cooled fluid or body is from −15° C. to 15° C.; or which is a process for heating a fluid or a body, in which the temperature of the heated fluid or body is from 30° C. to 90° C. 
     
     
       8. A process for reducing the environmental impact of a heat-transfer installation comprising a vapor compression circuit containing an initial heat-transfer fluid, said process comprising a step of replacing the initial heat-transfer fluid in the vapor compression circuit with a final transfer fluid, the final transfer fluid having a lower GWP than the initial heat-transfer fluid, in which the final heat-transfer fluid is a composition as claimed in  claim 1 . 
     
     
       9. A quasi-azeotropic composition consisting of:
 a mixture of 5-30% by weight of 2,3,3,4,4,4-hexafluorobut-1-ene and 70-95% by weight of trans-1,3,3,3-tetrafluoropropene. 
 
     
     
       10. The quasi-azeotropic composition as claimed in  claim 9 , which is non-flammable. 
     
     
       11. A heat-transfer composition, comprising the quasi-azeotropic composition as claimed in  claim 9  as heat-transfer fluid, and also one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof. 
     
     
       12. A heat transfer installation comprising a vapor compression circuit containing a quasi-azeotropic composition as claimed in  claim 9  as heat-transfer fluid optionally with one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof. 
     
     
       13. The installation as claimed in  claim 12 , chosen from mobile or stationary heat-pump heating, air-conditioning, refrigeration, freezing and Rankine cycle installations. 
     
     
       14. A process for heating or cooling a fluid or a body by means of a vapor compression circuit containing a heat-transfer fluid, said process successively comprising the evaporation of the heat-transfer fluid, the compression of the heat-transfer fluid, the condensation of the heat fluid and the depressurization of the heat-transfer fluid, in which the heat-transfer fluid is a quasi-azeotropic composition as claimed in  claim 9 . 
     
     
       15. The process as claimed in  claim 14 , which is a process for cooling a fluid or a body, in which the temperature of the cooled fluid or body is from −15° C. to 15° C.; or which is a process for heating a fluid or a body, in which the temperature of the heated fluid or body is from 30° C. to 90° C. 
     
     
       16. A process for reducing the environmental impact of a heat-transfer installation comprising a vapor compression circuit containing an initial heat-transfer fluid, said process comprising a step of replacing the initial heat-transfer fluid in the vapor compression circuit with a final transfer fluid, the final transfer fluid having a lower GWP than the initial heat-transfer fluid, in which the final heat-transfer fluid is a composition as claimed in  claim 9 .